package utils;

import java.io.IOException;
import java.io.InputStream;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

public class SqlSessionFactoryUtils {
	static SqlSessionFactory sqlSessionFactory = null;
	public static void buildSqlSessionFactory(){
		String configFilePath = "MyBatisConfig.xml";
		if(sqlSessionFactory != null) return;
		try{
			InputStream inputStream = Resources.getResourceAsStream(configFilePath);
			sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
		}catch(IOException e){
			e.printStackTrace();
		}

	}
	
	public static SqlSession openSqlSession(){
		if(sqlSessionFactory == null)  buildSqlSessionFactory();
		return sqlSessionFactory.openSession();
	}
}
